svn commit: r233097 - head/sys/amd64/amd64
Nathan Whitehorn
nwhitehorn at freebsd.org
Sat Mar 17 22:14:44 UTC 2012
On Mar 17, 2012, at 5:04 PM, Alan Cox wrote:
> Author: alc
> Date: Sat Mar 17 22:04:58 2012
> New Revision: 233097
> URL: http://svn.freebsd.org/changeset/base/233097
>
> Log:
> With the changes over the past year to how accesses to the page's
> dirty
> field are synchronized, there is no need for pmap_protect() to
> acquire
> the page queues lock unless it is going to access the pv lists.
>
> Reviewed by: kib
Under what circumstances does the page queue lock actually have to be
held? It looks like from this that I can remove the page queue lock
from the PPC/AIM pmap_protect() completely, but I don't have a good
sense of it.
-Nathan
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